#1. What is a Fan?

Fans used for ventilation and air movement work by one of two different methods. The most common is the axial or propeller fan, similar to those used on stands for moving air in a room or used in computers for cooling power supplies. They can move large volumes of air at low pressures.

The other type is a centrifugal unit, the latter is rarely used in domestic fans as they are bulky and usually cost a minimum of twice that of an equivalent axial fan.

Axial fans are the most common, and are more compact.
Other Questions that might be of intrest ...
  1. How Much Air Do I Need?
  2. What do I do if the Weiss HVS stops working?
  3. What is the Warranty on the Weiss HVS?
  4. Noise Ratings
  5. What is a Fan?
  6. Will the HVS System work the same with the internal doors closed?
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Due to the variation between cities and countries, we have to keep the advice fairly general, and you should check your local requirements.